Assessment of Heat-tolerance Potential in QTL Introgressed Lines of Hybrid Rice Restorer, KMR-3R through PS-II Efficiency
نویسندگان
چکیده
Aims: To assess heat-induced PSII damage and efficiency in eight promising backcross introgression lines (BC2F6) of KMR-3R/N22 possessing qHTSF1.1 qHTSF4.1.
 Study Design: Randomized Complete Block Design (RCBD) with three replications.
 Place Duration Study: ICAR-Indian Institute Rice Research, Hyderabad India during wet/rainy (Kharif) season 2018.
 Methodology: Eight ILs parents were evaluated for heat tolerance. The high- temperature stress was imposed by enclosing the crop a poly cover tent (Polyhouse) just before anthesis stage. fluorescence parameters viz., maximum photochemistry (Fv/Fm), Electron transport rate (ETR), effective quantum yield (ΦPSII), coefficient photochemical quenching (qP) non-photochemical (qN) measured under ambient high-temperature stress.
 Results: heat-tolerance potential assessed terms activity. results indicated that significant differences observed between treatments (T), genotypes (G) interaction T × G. physiological basis introgressed QTLs controls spikelet fertility maintaining productive adaptive strategies heat-tolerant QTL stable photosynthetic apparatus (PSII) Conclusion: Fv/Fm ratio denotes PSII. exhibited noted better performance stress. They may be used as donors traits breeding rice
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ژورنال
عنوان ژورنال: International Journal of Enviornment and Climate Change
سال: 2021
ISSN: ['2581-8627']
DOI: https://doi.org/10.9734/ijecc/2021/v11i1130540